Improved fruit-jar



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JOHN L. MASON, OF. NEW YORK, N. Y.

Letters Paten-.t No. 87,274, dated February 23, 1869.

nvxrncavzin FRUITJAR.

The sshedule referredto in these Letters Patent and making part of thesame.

To all whom it 'ma/y concern: v

Be it known that I, JOHN L. MASON, of New York city, in the county' andState of New York, have invented a. new and useful Improvement inPreserve- Jars; and I do hereby declare that the following is a full,clear, and exact description thereof', reference being had to theaccompanying drawings, making a part of this specification, in which--Figure 1 is' a side elevation of a jar, with 'my improved cover upon it.Figure 2 is an enlarged diametrical section through the jar', withitscover secured in place upon it.

Figure 3 is a side view of the jar, without its cover,

but with the packing-ring in place.

Figurefiis adetail section of a portion of a jar, having the ilangesurrounding its mouth, andl the rim of its cover, considerably bevelled.

Similarletters of reference indicate corresponding parts in the severalgures. l

The nature of my invention consists in applying a rubber gasket-ringedgewise upon a horizontal shoulder, which is above a continuous screw,and having said ring so set against an oblique seat on4 the neck of thejar, 1n combination with a flanged jar-cover, of

less diameter than the diameter to which the said ringl can becompressed when 4on its seat, whereby, when4 the pressure of thescrew-ring is made to act upon the cover, the lower` edge of the .angeof the cover is caused to press uponA the lrubber gasket with an inwardlateral force, and, at the. same time, up-

set a portion of the said ring, and'i'orce such upset portion downwardand outward upon the horizontal gasket-shoulder, in such a manneras topack the joint immediately between the flange ci' the cover and thegasket-shoulder, while, at the same time, the vertical joint between therim of the cover and the neck or rib ofthe jar, is also packed. a

-Thus, it is`seen, with a single gasket-ring, set edgewise, in anoblique position, upon an extended gasketshoulder, and against the neckor rib of the jar, Ibave packed two joints, which are outside of thejar, above the glass screw, and wholly beyond the -influence of the.gases arising from the contents of the jar.

Previous to the date of this invention, I had filed an application for apatent on ajar, which has a lhorizontal gasket-shoulder above the screw,on which a gasket-ring'was placed flatwise. In said application, Irepresented a cover with ,a rim, and held down by a sheet-metal screw,and therefore, my present invention is to be regarded only as animprovement, of subor- (isnaste character, to the invention led January15,

6 Y A is a jar, made of glass, or other vitreous substance,

with ascrewthread, a, formed on its external surface, and consisting ofa number of turns.

b is a horizontal shoulder, which forms the bottom side of an anriuiarrecess, c, which receivesan India rubber packing-ring, O, andpreventsthis ring from risingout of its place.

The recess c surrounds the base ofthe month d, of the jar, the externalsurface of which mouth is upis at the terminus of the 'said threadedportion, will aiiord a widebase upon which to receive upon it all thatportion of the India-rubber packing C, which is rexpandedby a verticaland lateral compression of this packing, when the cover Dis forciblyconfined in its plaze over the mouth of the jar, as shown in tige. 1, 2an 4. v

Cover D isA constructed with a downwardlyfflanng rim, e, terminating, atits lower end, in an external rib or ange, g,- -and this cover should beso constructed, with reference tol the 'size and bevelled shape of theIno'uth` d, that, in the act ci'. conning it in place, as shown'in gs.Zand 4, its inner bevelled surface e will compress the packing C, bothlaterally and vertically. That portion of the packing which will, undersuch pressure, swell out beneath the bottom edge of the cover,'will becompressed between this edge and `the extended shoulder b, as shown ings. 2 and 4, and thus form both a vertically and a laterally-packedjoint, with a single packing-ring. The' sheet-metal screw-ring B', withits flange at h, is used to confine the cover D in its place, as abovedescribed.

I am aware that it is not new, in fruit-jars, to introduce apacking-ring into an annular recess made in a bevelled external surfaceof the mouth of a jar. But I am not aware ythat, prior to my invention,such a grooved or recessed jar has been made with ahorizontally-extended shoulder', `b, which would receive upon it thatportionl of the rubber packing which is crowded downward and expanded bythe act of forcing the cover to its place, and thus adapting a singlepackingring to seal two joints, to wit, the joint which is inside of theinner surface e, of the rim of the cover B, and the joint which 'isbetween the bottom edge lof the rim of the cover and theunderlyingshoulder b.

I donot claim, under this petition, the screw-ring B, nor the flanged,inverted, cup-shaped cover I), nor the placing of a packing-ring uponthe external surface of the rib surrounding the' mouth of a jar.

Nor do I claim the construction of a jar with a screwthread,ltern1inating in a dat shoulder, b, nor the wardly tapering, andof less diameter than that portion of the jar which has the screw-threada formed on it. Consequently, the horizontal shoulder b, whichconstruotion of a jar with a bevelled or upwardly-tapering rib, d, asthese parts have hereto` been fully described by me in previousapplications for Letters Patent.

Nor do I ever intend to claim, under this application, theinve tionembraced in my application, led January l5, 1868.

Nor do I claim a gzrskevririg, set edgeWise, and wholly compressedWithin the rim e, of the cover.

Nor do I claim a gasketering set into the edge of a cover.

Nor do I claim a gasketring set down upon a shoulder, and impiuged uponat Vits top by a riur, which acts with only a straight downwardpressure.

In a word, I do not claim anything which has been invented prior to myinvention; but

scribed.

JOHN L. MASON. `Wituesses:l

R. T. CAMPBELL, JULxUs HIRsoH.

